Triphalangeal thumb -- polysyndactyly syndrome: Rare Disease

Triphalangeal thumb -- polysyndactyly syndrome is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Triphalangeal thumb -- polysyndactyly syndrome, or a subtype of Triphalangeal thumb -- polysyndactyly syndrome,
affects less than 200,000 people in the US population.

Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Triphalangeal thumb -- polysyndactyly syndrome as a "rare disease".
More information about Triphalangeal thumb -- polysyndactyly syndrome is available from Orphanet

About prevalence and incidence statistics:

The term 'prevalence' of Triphalangeal thumb -- polysyndactyly syndrome usually refers to the estimated population
of people who are managing Triphalangeal thumb -- polysyndactyly syndrome at any given time.
The term 'incidence' of Triphalangeal thumb -- polysyndactyly syndrome refers to the annual diagnosis rate,
or the number of new cases of Triphalangeal thumb -- polysyndactyly syndrome diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.

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